نتایج جستجو برای: fractional diff erential equation

تعداد نتایج: 287379  

In this paper, a numerical efficient method is proposed for the solution of time fractional mobile/immobile equation. The fractional derivative of equation is described in the Caputo sense. The proposed method is based on a finite difference scheme in time and Legendre spectral method in space. In this approach the time fractional derivative of mentioned equation is approximated by a scheme of ord...

Journal: :Cadernos de psicologia (Ribeirão Preto) 2022

he aim of this study was to examine empirical evidence published between 2015 and 2020, involving maternal vocalization premature babies in the context Neonatal Intensive Care Unit (NICU). Damiani, N. B., Piccinini, C. A.2Cadernos de Psicologia, Ribeirão Preto, vol. 1, nº p. 1-21 - Abril/2022This is a narrative review literature found PsycINFO, PubMed, LILACS, MEDLINE CINAHL. Seventeen studies ...

Journal: :iranian journal of numerical analysis and optimization 0
esmail hesameddini elham asadollahifard

in this paper, the sinc collocation method is proposed for solving linear and nonlinear multi-order fractional differential equations based on the new definition of fractional derivative which is recently presented by khalil, r., al horani, m., yousef, a. and sababeh, m. in a new definition of fractional derivative, j. comput. appl. math. 264 (2014), 65{70. the properties of sinc functions are ...

Journal: :international journal of industrial mathematics 0
m. mashoof‎ department of mathematics, lahijan branch, islamic azad university, lahijan, ‎iran.‎ a. h. refahi ‎sheikhani‎ department of mathematics, lahijan branch, islamic azad university, lahijan, ‎iran.‎

in recent years, there has been greater attempt to find numerical solutions of differential equations using wavelet's methods. the following method is based on vector forms of haar-wavelet functions. in this paper, we will introduce one dimensional haar-wavelet functions and the haar-wavelet operational matrices of the fractional order integration. also the haar-wavelet operational matrice...

1999
Manuel Bronstein

We describe some new algorithm and heuristics for computing the polynomial and rational solutions of bounded degree of a class of ordinary di erential equations, which includes generalized Riccati equations. As a consequence, our methods can be used for factoring linear ordinary di erential equations. Since they generate systems of algebraic equations in at most n unknowns, where n is the order...

Journal: :iranian journal of science and technology transactions of mechanical engineering 2015
d. dönmez demi̇r b. g. si̇ni̇r n. bi̇ldi̇k

in this paper, the dynamical behavior of an axially moving string modeled by fractional derivative is investigated. the governing equation represented motion is solved by the method of multiple scales. considering principal parametric resonance, the stability boundaries for string with simple supports are obtained. numerical results indicate the effects of fractional damping on stability.

Journal: :iranian journal of science and technology (sciences) 2013
h. kheiri

a computational method for numerical solution of a nonlinear volterra and fredholm integro-differentialequations of fractional order based on chebyshev cardinal functions is introduced. the chebyshev cardinaloperational matrix of fractional derivative is derived and used to transform the main equation to a system ofalgebraic equations. some examples are included to demonstrate the validity and ...

2000
J. A. Tenreiro Machado

The theory of fractional calculus goes back to the beginning of the theory of di erential calculus but its inherent complexity postponed the application of the associated concepts. In the last decade the progress in the areas of chaos and fractals revealed subtle relationships with the fractional calculus leading to an increasing interest in the development of the new paradigm. In the area of a...

Journal: :computational methods for differential equations 0
mohammadreza ahmadi darani shahrekord university. mitra nasiri shahrekord university.

in this paper we introduce a type of fractional-order polynomials basedon the classical chebyshev polynomials of the second kind (fcss). also we construct the operationalmatrix of fractional derivative of order $ gamma $ in the caputo for fcss and show that this matrix with the tau method are utilized to reduce the solution of some fractional-order differential equations.

Journal: :computational methods for differential equations 0
tahereh haghi sahand university of technology kazem ghanbari sahand university of technology, iran

‎‎in this paper‎, ‎the existence and uniqueness of positive solutions for a class of nonlinear initial value problem for a finite fractional difference equation obtained by constructing the upper and lower control functions of nonlinear term without any monotone requirement‎ .‎the solutions of fractional difference equation are the size of tumor in model tumor growth described by the gompertz f...

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